This introduces InterruptController and HardwareTimer classes to
handle the SoC specific implementations of timers and ints for
the ARM platform.
These could be improved and moved to a more 'generic' level once
we're confident they are 'good enough'.
NOTE: The OMAP timer implementation is fully untested and probably
completely non-functional....
If we find an FDT (either from uImage or otherwise) we make sure
we map it after mmu_init() and use kernel_args to pass it to the
kernel (so it is available at all times there).
This isn't really a bus_manager yet, but just minimal support so
we can get rid of hardcoded ARM SoC support from the core kernel
code.
Needs lots of work, like proper handling of #address-cells and
the like. Also, generic attribute handling, device_manager
integration, and I could go on for hours ;)
Recent linux behaviour (and also copied by BSD) is to preprocess
DTS files with the C preprpocessor to enable sharing constants between
driver implementation and DTS content for more readability.
Although done with the best intentions, the usage of #warning in the
ARM build makes it hard to see what's going on, or see any "real"
warnings.
Remove at least this particularly often triggered one, so we can
have a relatively "quiet" build again...
The "2nd" assert that we always ran into was due to bootloader mappings
still being active after VM init. Turns out we missed a call in the
architecture specific code for cleaning this up.
Many thanks to Ingo for spending the time to figure this out!
QEMU was crashing since when setting the DSS divider we were _clearing_
the TV divider, and QEMU did not check for a divide by zero.
This "fixes" the QEMU crash and gets us a working framebuffer on Beagle ;)
When the address is not page aligned, not only adjust the address
to start mapping, but also take the "overflow" on the last page
into account.
This makes the bootloader boot again ;)
No big functional reason for this, but rather keep it in sync now
then have to do lots of work later on, when there are major changes.
Once I have it fully fleshed out for ARM, I might take a look if
we can generalise it a little more, as there's lots of code
_exactly_ the same for both platforms (and other platforms in
progress using the same code).
* Removes default mapping of a portion of the RAM (will be done
as needed)
* Passes on the page directory area to kernel, so on early vm init
the kernel can use the area for pagetable allocation.
* Leaves it to the platform to pass in physical memory range(s). This
will ultimately come from FDT.
* Fix long standing issue with allocation of the heap, potentially
causing other part of the bootloader to overwrite the heap.
* Implements pagetable allocator in kernel for early vm mapping.
This fixes the first PANIC seen, we now just get the same one later
on when the VM is up... more to come...
We have _start/_end symbols to mark our start and end, use those
to determine where we are loaded. We're slowly getting closer to
a fully dynamic handling of our memory map!
Let the platform mmu_map_physical_memory the initrd region, and
reserve it before calling mmu_init. This removes another hardcoded
address, since e.g. U-Boot gets the address from the uImage file.
This reverts commit 3fbb24680c.
As I mentioned in #11131, this fix is not correct, and works around
the problem. The real reason was that arch_debug_call_with_fault_handler
was not working properly, so the fault handler went crazy.
With commit eb92810 that is fixed so this can be reverted.
This fixes the problem with KDL freaking out when doing a stacktrace
and having its fault handler triggered. Have no clue how this could
have worked before, but it did :P
This also adds the libtool_cross_generic package to ARM bootstrap,
which seems to be required for building ncurses successfully. I did
not have the time to verify that this is the case for x86_64 too, so
I'm not yet adding it to there (yet).
The ones with ARCH extension are used for setting up the KERNEL
ones, so no need to try and set both.
Also, the verdex target was not setting the ARCH one, and therefore
never configured gcc for ARMv5.
This causes configure of gcc/binutils to fail its test for sys/time.h, which
in turn causes compilation of gcc/binutils to fail.
Found trying to do a @bootstrap-raw build for ARM.
It references a non-existing device in the aliases, just comment
it out until we sort out with upstream what's up.
(Since we've also added PXA devices to the Verdex definition we
need to chat with them anyway)
Both for the rPI and the Verdex target we now have FDTs. The verdex
DTS is homebrew, the pxa DTSIs come from Linux and should be kept
in sync.
The rPI DTS and Broadcom DTSI come from FreeBSD HEAD, and should
ofcourse also be kept in sync.
One global new Jam rule has been introduced for handling DTS
compilation, aptly named CompileDTS....
More coming!
This is especially important for the assembler code in the kernel,
since it enables workarounds for some critical errata related to
exception handling.
Support for 64-bit atomic operations for ARMv7+ is currently stubbed
out in libroot, but our current targets do not use it anyway.
We now select atomics-as-syscalls automatically based on the ARM
architecture we're building for. The intent is to do away with
most of the board specifics (at the very least on the kernel side)
and just specify the lowest ARMvX version you want to build for.
This will give flexibility in being able to distribute a single
image for a wide range of devices, and building a tuned system
for one specific core type.
This adds the -mapcs-frame compiler flag for ARM to have "stable"
stack frames, adds support to the kernel for dumping stack crawls,
and initial support for iframes. There' much more functionality
to unlock in KDL, but this makes debugging already a lot more
comfortable.....
This helps when debugging, since when a driver/module causes a crash
while registering with the device manager, you can actually look at
the device manager state ;-)
The previously used method for programming the timer did not take
into account that our timespec is 64bit while the register we poke
it into is 32 bit. Since the PXA (SoC in Verdex target) has a limited
scale of resolution (us,ms,second) we dynamicly determine the one
that we can most closely match, and set that.
For f.ex. snooze to work however, we also need system_time to work.
The current implementation uses a system timer at microsecond
resolution to keep track of time.
Although the code is far from perfect, committing it now before
it gets lost, since I'm working on the infrastructure code
to properly factor out the SoC specific code out of the core
ARM architecture code (so the kernel can support more then
our poor old Verdex QEMU target ;))
The "blobs" in a U-Boot uimage are aligned at 4 bytes, which we
did not take into account. Found this when adding a 3rd blob
containing the Flattened Device Tree for ARM.
This as the intel partition addon just does a very weak test, and the
NTFS test is much safer. This prevents NTFS filesystems that have a
valid boot sector signature but no partition table, from being
picked up by the intel partition table add-on instead of the ntfs
add-on.
Patch provided by markh, thanks!
This is a workaround for hiding U-Boot that is stored in the first 2
128k blocks, so we can put a BFS image into NOR to boot from (since
we do not have support for SD/MMC yet in Haiku).
When manually putting a BFS filesystem at block 3 we actually get
right up to the point where BootScript is attempted to be executed!
Specifying -Werror in the Jamfiles directly prevents the build
system from disabling error-on-warning for some arch specific
warnings (or even globally), breaking the ARM build.
The "src/apps" directory is already setup to compile with -Werror
by the build system anyway, so remove the explicit setting here.
Turns out dd on MacOS does not like '1M' as size descriptor, but
wants '1m'. To prevent us breaking Linux builds (as it does not
accept 1m), just use the actual number of bytes explicitely instead.
This helps when debugging, since when a driver/module causes a crash
while registering with the device manager, you can actually look at
the device manager state ;-)
The previously used method for programming the timer did not take
into account that our timespec is 64bit while the register we poke
it into is 32 bit. Since the PXA (SoC in Verdex target) has a limited
scale of resolution (us,ms,second) we dynamicly determine the one
that we can most closely match, and set that.
For f.ex. snooze to work however, we also need system_time to work.
The current implementation uses a system timer at microsecond
resolution to keep track of time.
Although the code is far from perfect, committing it now before
it gets lost, since I'm working on the infrastructure code
to properly factor out the SoC specific code out of the core
ARM architecture code (so the kernel can support more then
our poor old Verdex QEMU target ;))
The "blobs" in a U-Boot uimage are aligned at 4 bytes, which we
did not take into account. Found this when adding a 3rd blob
containing the Flattened Device Tree for ARM.
This as the intel partition addon just does a very weak test, and the
NTFS test is much safer. This prevents NTFS filesystems that have a
valid boot sector signature but no partition table, from being
picked up by the intel partition table add-on instead of the ntfs
add-on.
Patch provided by markh, thanks!
This is a workaround for hiding U-Boot that is stored in the first 2
128k blocks, so we can put a BFS image into NOR to boot from (since
we do not have support for SD/MMC yet in Haiku).
When manually putting a BFS filesystem at block 3 we actually get
right up to the point where BootScript is attempted to be executed!
Specifying -Werror in the Jamfiles directly prevents the build
system from disabling error-on-warning for some arch specific
warnings (or even globally), breaking the ARM build.
The "src/apps" directory is already setup to compile with -Werror
by the build system anyway, so remove the explicit setting here.
Turns out dd on MacOS does not like '1M' as size descriptor, but
wants '1m'. To prevent us breaking Linux builds (as it does not
accept 1m), just use the actual number of bytes explicitely instead.
It has no use, since we don't know its value and the list of colors
might be longer (for example, for ARM currently B_MAX_CPU_COUNT is
only 1). The modula operator later on makes sure we keep within the
bounds of the kColors array anyway.
Ithamar R. Adema